Remote Management not working in the Nighthawk app

smae issue here with Xfinity, just got off the phone with them, 1 1/2 hours and they couldnt figure it out. Since the xfinity "scheduled maintence" 3 days ago, i started having these issues where the xfinity app/ xfinity online wouldnt show my modem, it shows "somethings gone wrong" under modems, but doesnt give me details. i've reset the modem, power cycled and its still not showing. My xbox one x is hard wired to the c7000 and the divsion shows "poor connection to host server". Xfinity said i needed to contact netgear because everything on xfinitys side is ok, its the netgear thats not allowing itself to be seen. This is so frustrating.